Pressure-regulator.



No. 63815:. Patented pad. 5, I899.

A. KLEINFELDT. PRESSURE REGULATOR. I

(N M d (Application filed Mm: 6. 1899.)

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ARTHUR KLEINFELDT, OF NEW YORK, N. Y.

PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 638,251, dated December5, 1899.

Application filed March 6, 1899. Serial No. 707,844. (No model.)

such as are commonly employed in the han dling of liquefiedcarbonic-acid gas.

One object of the invention is to produce a valve of this generalcharacter, although not of necessity limited to the particular usereferred to, in which a pressure indicator or gage and thepressure-regulatin g valve shall both be operated from or by a singlediaphragm, thereby producing an instrument which shall combine thefunctions of two separate instruments and shall cost less to manufacturethan the two separate instruments.

Another object is to provide such a yielding connection between thediaphragm and the controlling or regulating valve that the formershallbecapable ofcontinuingitsmovement after the valve has reached its seat,whereby any increase of pressure due to leakage will be indicated.Improved means are also provided for effecting adjustment of the valve,and the construction and arrangement of the parts are such thattheliability of valves or regulating devices of this character to berendered useless by freezing under the intense cold developed by therapid expansion of the compressed gas is reduced to a minimum. A,

combined safety-valve and blow-off cock is added to the structure tocooperate with the regulatin g and indicating devices and prevent injurythereto by excessive pressure.

The several features of improvement are illustrated in a convenient anddesirable form in the accompanying drawing, which represents theimproved indicating and regulating device in vertical central section.

The main body A, to which the other parts are secured, is recessed, asat a, to form with the diaphragm B a chamber within which the pressureof the gas is exerted against the diaphragm, the position of the latterand of the parts connected therewith changing with variations in thepressure. Gas is admitted to the chamber through a central porta',throu'gh which also passes the valve-stem, as hereinafter described,and an outlet from the chamber is provided at 0.

Thediaphragm B is clamped upon the body A in the usual manner by a cap 0and screws 0, the cap also affording bearing for a portion of thetransmission mechanism (indicated by the rack b) secured to thediaphragm, pinion b,and bevel gears b bibetween the diaphragm and' theindicator D, the bevel-gear 12 being shown as secured to the shaft ofthe indicator. The precise character of the transmission devices isobviously immaterial, and any ordinary form of such devices may beadopted in place of that-shown.

The valve E is arranged to close the mouth of the port or passage a andis inclosed within a chamber f of comparatively restricted capacity,formed within a connection-piece F, which is secured by bolts or screwsf to the body A and has an inlet for the gas. The valve is preferablymounted adjustably upon its screw-threaded stem 6, so as to be capableof adjustment toward or from its seat by rotation upon the stem. Thelatter is not connected rigidly to the diaphragm B, as is usual indevices of this general character, but is yieldingly connected thereto,so that the diaphragm shall be capable of movement after the valve hasreached its seat in order that it may yield to an increase of pressureoccasioned by aleak or otherwise and cause the indicator to respond tosuch increase of pressure. For this purpose the connection between thediaphragm B and the valve-stem e is effected by means of a spring, suchas that shown at c, which permits the diaphragm to move away from theend of the valve-stem when the valve has reached its seat. The springmay be secured to the diaphragm in any suitable manner, as by means ofthe screw b For the purpose of effecting adjustment of the valve withoutrequiring the casing of the regulator to be opened, the outer face ofthe valve is formed with a squared or other angular opening c to beengaged by a similarly-shaped pin or shank g, formed on the end of aspindle G, which is mounted -to rotate gas-tight in a suitable bearingin the wall of the connection-piece F in line with the valve andvalve-stem. A flange g may be formed on the spindle and be held snuglyagainst its seat on the wall of the connectionpiece by a spring ginterposed between the outer face of the connection-piece and thehand-wheel g on the spindle, thus dispensing with a stuffing-box andmaking the adjustment of the parts easy. The length of the pin or shankg and of the hole 6 is such that the necessary longitudinal movement ofthe valve with respect to the shank or pin is possible withoutdisengagement of the valve from the spindle. It is obvious that theshank or pin might equally well be formed on the valve to engage acorresponding hole on the spindle. In connection with the gasoutlet (1is a combined safety valve and blow-off cock, comprising a cap H,secured over a port a a plunger-valve h, normally held to its seat overthe port a by a spring h, and a lever h mounted on the cap and engagingthe stem of the valve. An outlet from the cap is provided at 77,Adjustment of the valve is effected by means of the screwthreadedengagement of the cap II with the boss, in which the port a is formed,the spring h being compressed more or less by adjustment of the cap. Itis obvious that the valve h will lift at the pressure determined by thetension of the spring h, thereby relieving the pressure in the chamber aand preventing injury to the diaphragm or the indicator, and that bymeans of the lever h the valve it can be lifted whenever it is desiredto blow off.

As already stated, the chamberfis of restricted capacity as comparedwith the chamber a, so that in handling liquefied carbonicacid gas, forexample, there can be no such excessive expansion within the chamber Fin which the valve E is located as to cause a freezing up of the valve.Furthermore, as the pressure is reduced as the gas passes the valve thecold occasioned by expansion within the chamber a is not sufficient toproduce frost therein.

It will be understood that the invention is not to be limited to theprecise construction and arrangement of parts shown and describedherein.

I claim as my invention-- 1'. In a combined pressure regulator andindicatorthe combination with a gas-chamber and a diaphragm subject tothe pressure of gas therein, of an indicator mechanically connected toone side of said diaphragm, and a valve to control the admission of gasto said chamber mechanically connected to the other side of saiddiaphragm, whereby the pressure of gas in said chamber controls both thein dicator and the valve substantially as shown and described.

2. In a pressure-regulator, the combination with a gas-chamber and adiaphragm subject to the pressure of gas therein, of a valve to controlthe admission of gas to said chamber, and a yielding connection betweensaid valve and said diaphragm, whereby the valve is moved with thediaphragm in both directions but the diaphragm is permitted to continueits movement away from the valve after the latter has reached its seat,substantially as shown and described.

3. In a pressure-regulator, the combination with a gas-chamber and adiaphragm subject to the pressure of gas therein, of a valve to controlthe admission of gas to said chamber, and a spring connecting saiddiaphragm to said valve whereby the valve is moved with the diaphragm inboth directions but the diaphragm may continue its movement away fromthe valve after the latter has reached its seat, substantially as shownand described.

4. The combination with a gas-chamber and a diaphragm subject to thepressure of gas therein, of an indicator connected to one side of saiddiaphragm, a valve to control the admission of gas to said chamber, anda yielding connection between said valve and said diaphragm,substantially as shown and described.

5. In a pressure-regulator, the combination with a gaschamber and adiaphragm subject to the pressure of gas therein, of a threadedvalve-stem connected to said diaphragm, a valve to control the admissionof gas to said chamber and threaded upon said stem, and a rotatablespindle mounted in the wall of the regulator and engaging said valve torotate the same while permittinglongitudinal movement of the valve withrespect to the spindle, said spindle having a flange to bear against itsseat on said wall, substantially as shown and described.

This specification signed and witnessed this 31st day of January, A. D.1899.

' ARTHUR KLEINFELDT.

In presence of- A. N. JEsBERA, F. M. EGGLESTON.

